I have a euphorbia trigonas and have noticed that it's not doing well. I know they don't get watered now however the cactus mix I used didn't drain well. So I have cut the E.T. and would like to know about how long it will to take to callous.
Give your cuttings 3-4 days before planting. Don't let them dry out and shrivel as they take longer to come back.